1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b76a7bc081f0fbfeb48ac20aca967ceac36f0b3a263182b39149049950ff86. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5537ace6-7390-4f72-bfb0-3baee3370ed3.json and https://artists.proofprofile.net/proofs/artist/5537ace6-7390-4f72-bfb0-3baee3370ed3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b40b58c019fdaa6f47466a1c10ebf6048f19ad0d965d0c77cad406385a98ebc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE712100847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15f9917c15dac1746f1f238c087aca32b4eacac6c11fba5a18f5a600dca76a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE712100848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53423add37c750ca8109f21aaf34fc2e875c0944cac3f6eede008473164bbc9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2108960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb326e807d9b0c9f8f157f990b10059542eef42811902ce31cdfe3d32cb746e75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQ692300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee17f541e4bc32cbc95de3eed5e3899496425be590e4e260541d1bd2e3e56dc1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2226701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57221f6d481b628c58fdd8cbe84c76ce8245f09c51b7e7698fe8f38813a4623. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2207032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9d1b790fa62cb81f502a4216b2b634a0ea70588a5e77597163dba706fb2c51. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2207033.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a6bf9ed1dd7b4865c89961e681f2c893fe9ff5da92d52c0c59fde91ef839a5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2138963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585e913a4b419b5d4a08eee8962d187a41279e2e9fa0cac28b734d04bedc8b4c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2138964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1302830739135edb20f541d1ef8c9ea1166fe90addf0527281d87719aa06ab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2139354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040cec21d89b1080d2f8d0300fcb38c3b17d6880c02fd735dbb57e79a71f1650. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKR6V2170216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff9b966371bfaadb8e00cfbb7a680e354c141a7cfa4d95e87f9c39741f97e93. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKRMQ2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04a7c15a1c131792edf8d634de26547da90cfdbfa504b22b4118ce6ea128ca. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKRMQ2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120cd0820fb64b7266fe60dcc76c75864e0bc985467a9f370284453f1d565ece. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKACT2061189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de5c0a86b0c42e146d1f133af7a751247e5e9155224849a0cabab1f78569953. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKRMQ2000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb5650a8c83d3aae7c5cde39492b62e261dcb7279da7a7cd87c78246868965c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKRMQ2000616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f91d03c42ea64da8f4f79243f51336b838d7ad96e4468e28750ef6866d369fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES98I2000560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48493ddea1d7dbc9a951753319fc90e82a58517df4ffe621e34332849245fdca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES98I2000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397cfce970c65c8fa0ebf429317f74caf77c45212d89bfddcfc72c0f515eddd8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKACT1865520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f3d97522e7d4b24c7ddf17c25aaf05f2b8a3c2609221b5d1bd0120d212aff2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES98I1801765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c8100c5b8e9fa4c4a7932d20ba2dc8c4ac578ebffffd9cec67e3d48e27a84a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES98I1801761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04d3bdfba13db64c9f9ec57c2ab4fc2489742d9919fb9d959002256ef0aef1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2121391.
City Nights, City Lights - Sean & Dee Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b865f09ae0df1bdcd359b08f9fdef9028d1307df3463374920e057e8a9cfce7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2039623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b657d21c4129cb587f80e8b4d4c147017a543f9e00dfaa2dd8833f9d33abdd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2203684.